Buffers and Standards

Hydrogen ion buffers comprising a mixture of a weak acid and its conjugate base or vice-versa and used to stabilize pH; also diluents, washing solutions, and standard-value solutions used for a broad array of scientific calibration purposes.

The buffers used to calibrate pH meters may be certified and/or traceable to the National Institute of Standards and Technology (NIST). These buffers may also be color-coded for easy identification:

Red: pH 4.0
Yellow: pH 7.0
Blue: pH 10.0

Chromatography Standards (19,903)

Spectroscopy Standards (6,252)

General Chemistry Solutions (5,124)

Matrix Blanks and Standardization Solutions (4,193)

Life Science Buffers (3,693)

Electrochemistry Buffers (2,272)

Environmental Testing Standards (1,953)

Electrochemistry Standards (1,206)

Karl Fischer Buffers and Reagents (501)

Viscosity Standards (248)

Isotope Standards (202)

Quality Control and Proficiency Samples (186)

Kjeldahl Buffers and Reagents (103)

Gel Filtration Standards (60)

Matrix Modifiers (32)

Osmolality Standards (11)

Smoke Point Reference (7)

Polarimetric Standards (3)

61 – 75 of 40,395 results

Ricca Chemical Company EP Reference Solution BY₆, Brownish-Yellow Reference Solution, Ricca Chemical

Pricing & Availability

Ricca Chemical Company Silica Standard, 1000 ppm SiO₂ (467 ppm Si), Ricca Chemical

CAS: 6834-92-0 Molecular Formula: Na2O3Si Molecular Weight (g/mol): 122.062 InChI Key: NTHWMYGWWRZVTN-UHFFFAOYSA-N PubChem CID: 23266 ChEBI: CHEBI:60720 IUPAC Name: disodium;dioxido(oxo)silane SMILES: [O-][Si](=O)[O-].[Na+].[Na+]

Pricing & Availability
Specifications

PubChem CID	23266
CAS	6834-92-0
Molecular Weight (g/mol)	122.062
ChEBI	CHEBI:60720
SMILES	[O-][Si](=O)[O-].[Na+].[Na+]
IUPAC Name	disodium;dioxido(oxo)silane
InChI Key	NTHWMYGWWRZVTN-UHFFFAOYSA-N
Molecular Formula	Na2O3Si

Karl Fischer Aqualine™ Complete 5K, for Karl Fischer Titration By Volumetry, Fisher Chemical™

Pricing & Availability
Specifications

MDL Number	81734
Packaging	Amber glass bottle
Physical Form	Liquid

LabChem, Inc. Conductivity Standard, 1000μmho/cm, LabChem™

Pricing & Availability

Ricca Chemical Company Potassium Iodide, 50% (w/v), Ricca Chemical

CAS: 7681-11-0 Molecular Formula: IK Molecular Weight (g/mol): 166.003 InChI Key: NLKNQRATVPKPDG-UHFFFAOYSA-M Synonym: potassium iodide,potassium iodide ki,pima,kali iodide,thyro-block,knollide,kisol,asmofug e,potassium diiodide,potassium monoiodide PubChem CID: 4875 ChEBI: CHEBI:8346 IUPAC Name: potassium;iodide SMILES: [K+].[I-]

Pricing & Availability
Specifications

PubChem CID	4875
CAS	7681-11-0
Molecular Weight (g/mol)	166.003
ChEBI	CHEBI:8346
SMILES	[K+].[I-]
Synonym	potassium iodide,potassium iodide ki,pima,kali iodide,thyro-block,knollide,kisol,asmofug e,potassium diiodide,potassium monoiodide
IUPAC Name	potassium;iodide
InChI Key	NLKNQRATVPKPDG-UHFFFAOYSA-M
Molecular Formula	IK

Gibco™ CTS™ DPBS, without calcium chloride, without magnesium chloride

Gibco Cell Therapy Systems (CTS) DPBS is the classic Dulbecco's phosphate-buffered saline. This particular formulation lacks calcium, magnesium, and phenol red.

Pricing & Availability
Specifications

Includes	No Calcium, No Magnesium
Physical Form	Liquid
Manufacturing Quality	ISO13485, MDSAP, FDA-registered, 21 CFR820
Chemical Name or Material	DPBS
Recommended Storage	Store at 15–30°C.
Concentration	1X
For Use With (Application)	Cell and Gene Therapy Research, Development, and Manufacturing
Sterility	Sterile-filtered
Solution Type	Dulbecco's Phosphate Buffered Saline

Ricca Chemical Company Inorganic Carbon Standard, 1000 ppm C, Ricca Chemical

CAS: 144-55-8 Molecular Formula: CHNaO3 Molecular Weight (g/mol): 84.01 MDL Number: MFCD00003528 InChI Key: UIIMBOGNXHQVGW-UHFFFAOYSA-M IUPAC Name: sodium hydrogen carbonate SMILES: [Na+].OC([O-])=O

Pricing & Availability
Specifications

CAS	144-55-8
Molecular Weight (g/mol)	84.01
MDL Number	MFCD00003528
SMILES	[Na+].OC([O-])=O
IUPAC Name	sodium hydrogen carbonate
InChI Key	UIIMBOGNXHQVGW-UHFFFAOYSA-M
Molecular Formula	CHNaO3

Fisher Chemical Tris Hydrochloride, 1M Solution (pH 7.0/Mol. Biol.), Fisher BioReagents™

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N Synonym: Tris-HCl PubChem CID: 6503 ChEBI: CHEBI:9754 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol SMILES: C(C(CO)(CO)N)O

Pricing & Availability
Specifications

PubChem CID	6503
CAS	77-86-1
Molecular Weight (g/mol)	121.136
ChEBI	CHEBI:9754
SMILES	C(C(CO)(CO)N)O
Synonym	Tris-HCl
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

Karl Fischer Aqualine™ Matrix K, for Karl Fischer Titration By Volumetry, Fisher Chemical™

Pricing & Availability
Specifications

MDL Number	81734
Color	Colorless
Packaging	Amber glass bottle
Physical Form	Liquid

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Tris (Tromethamine) (Granular/USP), Fisher Chemical™

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 MDL Number: MFCD00004679 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N Synonym: Trishydroxymethylaminomethane,Tris Buffer,Tris,THAM,Trizma™,2-Amino-2-(hydroxymethyl)-1,3-propanediol,Tris base,Tris(hydroxymethyl)aminomethane,Trometamol PubChem CID: 6503 ChEBI: CHEBI:9754 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol SMILES: C(C(CO)(CO)N)O

Pricing & Availability
Specifications

PubChem CID	6503
CAS	77-86-1
Molecular Weight (g/mol)	121.136
ChEBI	CHEBI:9754
MDL Number	MFCD00004679
SMILES	C(C(CO)(CO)N)O
Synonym	Trishydroxymethylaminomethane,Tris Buffer,Tris,THAM,Trizma™,2-Amino-2-(hydroxymethyl)-1,3-propanediol,Tris base,Tris(hydroxymethyl)aminomethane,Trometamol
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

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Tris(hydroxymethyl)aminomethane (Cryst./Certified ACS), Fisher Chemical™

CAS: 77-86-1 Molecular Formula: C4H11NO3 Molecular Weight (g/mol): 121.136 MDL Number: MFCD00004679 InChI Key: LENZDBCJOHFCAS-UHFFFAOYSA-N Synonym: 2-Amino-2-(hydroxymethyl)-1, 3-propanediol,Trimethylol Aminomethane,Tris Buffer,Tris,Trizma™,THAM,Tris base,Tris(hydroxymethyl)aminomethane,Trometamol PubChem CID: 6503 ChEBI: CHEBI:9754 IUPAC Name: 2-amino-2-(hydroxymethyl)propane-1,3-diol SMILES: C(C(CO)(CO)N)O

Pricing & Availability
Specifications

PubChem CID	6503
CAS	77-86-1
Molecular Weight (g/mol)	121.136
ChEBI	CHEBI:9754
MDL Number	MFCD00004679
SMILES	C(C(CO)(CO)N)O
Synonym	2-Amino-2-(hydroxymethyl)-1, 3-propanediol,Trimethylol Aminomethane,Tris Buffer,Tris,Trizma™,THAM,Tris base,Tris(hydroxymethyl)aminomethane,Trometamol
IUPAC Name	2-amino-2-(hydroxymethyl)propane-1,3-diol
InChI Key	LENZDBCJOHFCAS-UHFFFAOYSA-N
Molecular Formula	C4H11NO3

Buffer Solution, pH 10.00 (Certified), Fisher Chemical™

Potassium Carbonate/Potassium Tetraborate/Potassium Hydroxide/Disodium EDTA Dihydrate

Pricing & Availability
Specifications

CAS	12228-88-5
Health Hazard 3	Emergency Overview May cause eye, skin, and respiratory tract irritation. Handle in accordance with good industrial hygiene and safety practice. Wear personal protective equipment. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Obtain medical attention. Obtain medical attention. . NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00146206
Health Hazard 2	CAUTION!
Color	Colorless
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
pH	10
Chemical Name or Material	Buffer Solution, pH 10.00
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray

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Buffer Solution, pH 4.00, Color-Coded Red (Certified), Fisher Chemical™

pH/temperature conversions given on label

Pricing & Availability
Specifications

Boiling Point	100°C
Description	pH/temperature conversions given on label.
Color	Red
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
Chemical Name or Material	Buffer Solution, pH 4.00, Color-Coded Red
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Density	1.0g/cm³
Absorbance	Pass Test
Concentration or Composition (by Analyte or Components)	Potassium Hydrogen Phthalate
CAS	16423-68-0
Health Hazard 3	Emergency Overview Contains a known or suspected carcinogen. The toxicological properties have not been fully investigated. Use personal protective equipment. Ensure adequate ventilation. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Do not induce vomiting. Obtain medical attention. NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00146206
Health Hazard 2	CAUTION!
Solubility Information	Soluble in water
pH	4.0
Specific Gravity	1
Melting Point	0°C

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Buffer Solution, pH 5.00 (Certified), Fisher Chemical™

Pricing & Availability
Specifications

Boiling Point	100°C
CAS	7732-18-5
MDL Number	MFCD00146206
Traceability to NIST	Traceable to NIST.
Packaging	Poly Bottle
Physical Form	Liquid
pH	5.0
Chemical Name or Material	Buffer Solution, pH 5.00
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Melting Point	0°C

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Buffer Solution, pH 7.00, Color-Coded Yellow (Certified), Fisher Chemical™

Pricing & Availability
Specifications

Boiling Point	100°C
Description	Potassium Phosphate Monobasic/Sodium Hydroxide. pH/temperature conversions given on label.
Color	Yellow
Traceability to NIST	Traceable to NIST.
Physical Form	Liquid
Chemical Name or Material	Buffer Solution, pH 7.00, Color-Coded Yellow
Grade	Certified
Identification	Pass Test
ChemAlert Storage Symbol	Gray
Density	1.0g/cm³
Vapor Pressure	760mmHg at 20°C
Absorbance	Pass Test
CAS	1934-21-0
Health Hazard 3	Emergency Overview May cause eye, skin, and respiratory tract irritation. Handle in accordance with good industrial hygiene and safety practice. Wash off immediately with plenty of water for at least 15 minutes. Get medical attention immediately if symptoms occur. Rinse immediately with plenty of water, also under the eyelids, for at least 15 minutes. Obtain medical attention. Move to fresh air. If breathing is difficult, give oxygen. Get medical attention immediately if symptoms occur. Do not induce vomiting. Obtain medical attention. . . NFPA Health:1 Flammability:0 Instability:0
MDL Number	MFCD00134130
Health Hazard 2	CAUTION!
Solubility Information	Soluble in water
pH	7.00
Specific Gravity	1
Melting Point	0°C

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Buffers and Standards

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Ricca Chemical Company EP Reference Solution BY6, Brownish-Yellow Reference Solution, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Ricca Chemical Company Silica Standard, 1000 ppm SiO2 (467 ppm Si), Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

LabChem, Inc. Conductivity Standard, 1000μmho/cm, LabChem™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Ricca Chemical Company Potassium Iodide, 50% (w/v), Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Ricca Chemical Company Inorganic Carbon Standard, 1000 ppm C, Ricca Chemical Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

Tris (Tromethamine) (Granular/USP), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 10.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 5.00 (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Buffer Solution, pH 7.00, Color-Coded Yellow (Certified), Fisher Chemical™ GSA/VA ContractAvailable on GSA/VA contract for Federal Government customers.Learn More

Ricca Chemical Company EP Reference Solution BY₆, Brownish-Yellow Reference Solution, Ricca Chemical

Ricca Chemical Company Silica Standard, 1000 ppm SiO₂ (467 ppm Si), Ricca Chemical

LabChem, Inc. Conductivity Standard, 1000μmho/cm, LabChem™

Ricca Chemical Company Potassium Iodide, 50% (w/v), Ricca Chemical

Ricca Chemical Company Inorganic Carbon Standard, 1000 ppm C, Ricca Chemical

Tris (Tromethamine) (Granular/USP), Fisher Chemical™

Buffer Solution, pH 10.00 (Certified), Fisher Chemical™

Buffer Solution, pH 5.00 (Certified), Fisher Chemical™

Buffer Solution, pH 7.00, Color-Coded Yellow (Certified), Fisher Chemical™